Weight indicator



NOV. 4, 1930. LINCOLN 1,780,238

WEIGHT INDICATOR Original Filed y 1924 66 51 O g was 70 O 6'0 c fi Inuenlor:

Robert? A. L1 ncaln,

Patented 4, i930 'I'EN'I OFFICE Bonner a meo or 'ronxawa, banan Assienon or ONE-HALF 'ro hxnnroan mom a MACHINE wonxs, me, or rommwa, oxmnoiu, A conromrion or ons- HOHA wmeii'r iiiiiicmron original application ma my 81, 1924, Serial no. 39,310.

Zlblvided and this application filed iai'cli 23, 1926.

Serial m 264,246.

. This invention relates to weight indicators for use in connection with rotary well drilling apparatus and more particularly to/a device, of this character which will besinijple and durable of construction and which may be readily transported from place to place, thereby meetingthe three greatest requirements of such an article employed in oil fields. p

An object of the invention is to provide a device which is capable of use with the pull ing ap aratus of a rotary well drilling rig and w ich has in combination therewith means capable of adjustment for preventing too great a portion of the weight .ofhth'e drilling apparatus being supported from the hoisting apparatus.

A further object of the invention is to provide a novel construction of weight indicator for indicating the weight supported by the hoisting apparatus. 1 p y Other objects will ap "ar, hereinafter.

The invention 'qo'nsj nthe features, combinationian'd arrangement of parts hereinafter described, and particularly pointed out in the claims. p p

In the accompanying drawings:

Figure 1 is aside elevation of an embodiment of my invention partially infsection.

Fig. 2 a section on line 24-2 of 1.

A cylinder 10 is provided with a piston 18 having a piston rod 14 extending through one end of thecylinder and carrying at its free en'dfa grooved pulley wheel 59. p The cylinder has preferably but one removable head in whieh a pressure gau'ge24 is a) mounted that it will indicate the pressure withinthe cylinder. The cylinder head 60 is fairly heavy of construction and the walls of the cylinder and headhaving dove-tails 61 at op pos'ite sides which engage in dove-tail grooves 62 formed in the arms 6301 a U- shaped yoke or frame 64. The head 60 of the cylinder. opposes the bight' portion 650i the yoke a1q 1 through his bight portion adjusting screws 66 are mounted to engage the head and force th'e 'cy1inder in one direction along the grooves '62. I V V p The ends of the arms '63 of the yoke are provided with angular projections 67 to which is bolted as at 68 a casing 69 having one open side. Within this casing are rotatably mounted in bearing means comprising a pair of grooved sheaves 70 which when the casing is bolted to the yoke are in the-same yert ical plane with the sheave 59 of the piston rod 14. .The upper and lower end walls of the casing 69 have formed therein "notches 71 through which the line 72 may be introduced. This line in this instance may be either the v dead-line oi the hoisting apparatus or the actual supporting line and in the latter casethe device acts as a spooling guide for the line. p

In the operation of this devicetheline is introduced through the open side of the cusing 69 into the notches and engaged in the pulleys 70. The screws 66 are then tightened to force the pulley 59 into engagement with the line between the pulleys 70 to kink the line. The line in its tendency to straighten places pressure against the pulley 59 and accjordingly against piston 18, with result that the gauge 24 gives a readi cordancfe with-"thepressiire to which thepiston subjected, The tendency the line to straighten underweight of thefdrilling apparatus is thus accurately indicated.

Where in th e appended claims ante the hoisting apparat e fi to is i Ineaneifth'en the (Hi mn si July '31-, 1924, weight in I la weight indicator for fiell drillirrg apparatus, the con binationan indicator, a cylinder and 'ean's Between the piston and a line ho s. ada t i f e,

diae t sh Stir fight "Wise aid 113 mu a w gates o efie'ct an margarit and aajii'st'zihl infieng" ge'mfeiit said cylindex; t6., a1fw said line straighten hutfand lower the with the indicator show'sIeirces'sive pressing. I 2. In a weight indicator for an drilling apparatus, the combination of an indicator,

in acgm chanism a cylinder and piston, means between the piston and a line of hoisting mechanism, which is adapted to engage an intermediate stretch of said line and normally deflect it from its straight course by pushing it away from said cylinder, said line under its tendency to straighten out due to pull thereon, pushing the piston to effect an indication, said piston and cylinder having their axes extending in a direction transverse to the general direction of the line and means for manually adjusting the cylinder and piston relative to each other.

3. In a weight indicator for well drilling apparatus, the combination of an indicator, a cylinder and piston, means between the piston and a line of hoisting mechanism, which is adapted to engage an intermediate stretch of said line and normally deflect it from its straight course by pushing it away from said cylinder, said line under its tendency to straighten out due to pull thereon moving the piston to effect an indication and means of adjustment in engagement with said cylinder to allow said line to straighten out and lower the apparatus when the indicator shows excessive pressure.

4. In a weight indicator for well drilling apparatus, the combination of a frame, a cylinder slidably mounted in said frame, a

piston in said cylinder having a piston rod adapted to extend into engagement with an intermediate stretch of the line of the hoisting apparatus to normally deflect the same from its straight course, an indicator connected to said cylinder, and adjustable means in said frame, engaging said cylinder, to control the tension in the line.

5. In a weight indicator for well drilling apparatus, the combination of a frame, a cylinder slidably mounted in said frame, a piston in said cylinder having a piston rod with a terminal pulley thereon, said rod extending to position its pulley 1n engagement with an intermediate stretch of the line of the hoisting apparatus to normally deflect the line from its straight course, an indicator connected to said cylinder, means in said frame for adjusting the slidable cylinder in the frame to regulate the tension in the line under the weight of the drilling apparatus, and a pair of pulleys in said frame one above and one below said deflecting pulley for preventing deflection of the line except therebetween.

In testimony whereof, I aflix my signature.

ROBERT A. LINCOLN.

piston 

